Walk behind string trimmer



FIG. 1 is a front perspective view of the walk behind string trimmer.

FIG. 2 is another front perspective view of the walk behind string trimmer of FIG. 1.

FIG. 3 is a rear perspective view of the walk behind string trimmer of FIG. 1.

FIG. 4 is another rear perspective view of the walk behind string trimmer of FIG. 1.

FIG. 5 is a front view of the walk behind string trimmer of FIG. 1.

FIG. 6 is a right side view of the walk behind string trimmer of FIG. 1.

FIG. 7 is a rear view of the walk behind string trimmer of FIG. 1.

FIG. 8 is a left side view of the walk behind string trimmer of FIG. 1.

FIG. 9 is a top view of the walk behind string trimmer of FIG. 1; and,

FIG. 10 is a bottom view of the walk behind string trimmer of FIG. 1. 

CLAIM The ornamental design for a “walk behind string trimmer,” as shown and described. 